This book of Hermetic Philosophy claims to be the essence of the teachings of Hermes Trismegistus. One of the foundations of the book is the dedication to the Seven Principles and there is a complete chapter describing each one in detail. Each one of the Seven Principles brings to light a number of ways to become more familiar with your self and become a better and more enlightened individual. Read more on Wikipedia.
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While the book is said to be authored by Three Initiates, they chose to remain anonymous, resulting in much speculation as to the actual author. You can read more on Wikipedia at the link above.